Electrode-clamping device for electric welding machines



Jan. 9, 1923. 1,441,443.

' J. W. MEADOWCROFT.- ELECTRODE CLAMPING DEVICE FOR ELECTRIC WELDING MACHINES.

F141 5 6 MENTOR l/WW (I 4 TTORNEY vented certain new an Patented Jan. 9, 1923.

UNITED STA JOSEPH w. mmnowcnor'r, or EDWARD G.= 'BUDD mnnorac VANIA, A CORPORATION or TEES PiTI-Elti'i" @FFECE.

PHILADELPHIA. PENNSYLVANIA, ASSIGNOR TO TUBING COMPANY, OF PHILADELPHIA, PENNSYL- PENNSYLVANIA.

ELECTBDIDE-CLAMPING DEVICE FOR ELECTRIC WELDING MACHINES.

Application filed August 16, 1921.

To all whom it may concern I, Josnrn Be it .ltnown ,that

,cnorr,. .a citizen of the Unite ing atil hil adielphia,

.in rile ctrodeeQlampmg a dlttgMwh a s clare. the following to-lpe a exact description.

Mnauow- States, res d- Pennsylyaiiia, have ind useful Improvements Devices for Electric of which I, de

full, clear, and

-My invention relates to an improyed device ior releasably .loclringpr clamping the electrodes'jused inelectric wielding machines. p

' to .a device for rode .in' .posiof an elec It relates} particularly,

clamping. the stationary ele tion relative d trio spot-welding T e at nary mof.

spot

welderai s usually madenoi copper so as l to .fur nish,a;,low resistance path for; the welding.-current. eretofofe practice to msert the transverse opening in it has been the electrodethrough a thearr'n and to -c amp it inplace hya set screw. This has proven objectionable because 7 the workman, m

loosening the electrode when adjusting or removing it, frequently pounds or hammers ostart the electhe end of the arm in order t trode... This batters the soft copper arm and soon distorts it so that its life is very materially shortened. The object of may be my invention a device for clamping the ele released or applied ver is to provide ctrode which y easily and it is unnecessary to pound the end of the stationary supporting arm in order to release the electrode.

Further objects,

and objects relating to economics and details of construction and operation, will definitely detailed description to follow. tion is clearlydctined and pointed out in the appended claims. one preferred cm appear from the My inren- A structure constituting hodiment. of my invention is illustrated in the aifroinpauying drawing.

part

of this specification.

iii

Fig. l is a porspr tim \lt\ of the end f.

thc stationar supporting Welding IlHHllttlt. showing arm of an clertrir tin clamped in position hi :i derive lt llillttillftl in arrordanrc with my iiifliillflli.

l ig. ll l5 u taken SttliSlJdllilflliY on line and hoiixinital. sectional Vin. of Fig. l.

eter of this passageis such, the diameter of the electrode,

positioned.

Serial No. 492,697.

through the end of the stationary supportmg arm of the welding machine, 111 which assage the electrode is mounted. The diam; with respect to that the latter isfree to slide insaid passage but is held rigidly therein by wedge means acting on the electrode and; forcing it against one wall of the passage, so'as to clamp the electrode in adjusted position. This may be accomplishedhy providing a recess or opening extending through the arm of the welding machine and communicating with the opening or passage in which the electrode is positioned. The end wall. of this recess may be inclined so as to cooperate with the inclined side oi a wedge which may be forced into said recess between theend wall thereof and the electrode, so as to clamp the electrode against the side of the passage in which it is I haveillustrated in the drawin a structure which constitutes one embodiment of my invention and. which comprises the arm. 10, of the welding machine provided with a cylindrical passage, 11, extending transversely through the end thereof. There is also provided a transverse recess or passage, 12. which communicates with the cylindrical passage, 11, for the electrode and which is of less; \a'idth than the diameter of the cylin' drical passage. ll. The end wall of the re res. .2. is inclined. as shown at it, in Fig. .l, to nstitute a wedge surface. Th elm troilc. til. prorided with a water passage. l t, for r oting. is positioned in the c liudriral passage. lt. extending through the arm of th welding machine. and the diameter ot this passage. it. is slightly greater than that i the electr de. t t. so that the latter will slide freely in said passage except \rhen it is hold in adjusted position by the clamping means uhich I will now describe. A edge 15 i inserted in the transverse recrss or pas t2. and the inclined side, ii". of said lot] 2. An electrode clamping device for electric welding machines comprisin an arm of the weldin" machine having a ransversc passage thereliliruugh, in awfhich an electrode (its loosely und-. is .moyable freely, and a. wedge movable-"longitudinally of said elecimde and engaging said electrode to clamp it i igimy figi'iifiitt ohefside' 'ofrfisazid passage.

3. An el ectrode clamping device for elecpassage.

JOSEPH W. EADOWORG'FT. 

